This is the TKMB: Precision Machined, which is a small, comfortable, well-balanced, lightweight, strong milled titanium pen.
The TKMB is just 12.5cm (4.9") long and is milled from titanium rod. The tip is milled as well, and press-fitted into the barrel. I tried for ages to dislodge mine, and could not. Brad finally smacked me up-side-the-head and reminded me that the back-cap unscrews to gain access to the insides to refill the pen.
Empty, the pen weighs a slight 12g (2.14 US Quarters in weight), and with a refill a mere 17.5grams (3.12 US Quarters in weight).
The working end and tail are machined with threads to take a similarly highly engineered cap, (with or without a magnet, guess which I chose?).
Interestingly, Brad designed these pens to be as slim as possible (thanks to the tremendous machining available to us in the modern equipped world) and to be able to take the "Fineliner" and "Rollerball" refills perfectly, along with Parker, Fisher, Schmidt, Monteverde, Mont Blanc, Caran D'Ache, Cross. I bought and fitted a Parker "Space Pen" refill to mine,along with the included rubber tubing spacer, and the additional 8 mini-magnets.
What's with all the magnets, you might ask?
Between the magnet in the end cap, and the internal magnets, which can be placed in a couple of different configurations, you have the ability to both pick up ferrous materials (dropped screws anyone?) and also being able to place stow and store the pen. I also found that I could retain the clip on the side with the magnet.
Magnets are awesome, and I love it when I can add some to my kit. Another great element of these pens are the groves milled into the sides of both the working end and along the caps. Using the included o-rings, you can customise the grip and balance of the pen. Brilliant for those of us with big hands, and giving you a better fit, in case you are stowing yours in PALS/MOLLE like I do.
As with all of Brad's work, its highly engineered, thoroughly tested and fir for purpose, and in this case, came with a killer custom anodizing job, (thanks for that!). I even got a second one to give to my partner, because having a reliable pen, is essential, and the titanium body, Parker Space Pen combination was too good not to share!